Sports Sensors Paintball Radarchron Small microwave Doppler radar sensor for measuring paintball speed Built in microprocessor calculates foot-per-second speed on LCD display Captures speeds between 150 and 450 feet per second (2 percent accuracy) Rugged plastic housing seals internal electronics from dust, dirt, and moisture Measures 2.5 x 1.19 x 3.5 inches (W x H x D), weighs less than 3 ounces